Odakyu 4000 series
E771523
The Odakyu 4000 series is a Japanese electric multiple unit commuter train type operated by Odakyu Electric Railway, designed for through-services with Tokyo Metro and known for its modern, energy-efficient features.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Odakyu 4000 series EMU | 3 |
| Odakyu 4000 series canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8976861 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Odakyu 4000 series Context triple: [Tokyo Metro Chiyoda Line, rollingStock, Odakyu 4000 series]
-
A.
Seibu 40000 series
The Seibu 40000 series is a modern Japanese electric multiple unit train operated by Seibu Railway, designed for commuter services with features such as long-distance comfort seating and improved passenger amenities.
-
B.
Nagoya 5000 series trains
The Nagoya 5000 series trains are Japanese-built electric multiple units originally used in Nagoya that were later exported and adapted for service on Buenos Aires’ Line D of the underground.
-
C.
Keio 1000 series EMU
The Keio 1000 series EMU is a Japanese electric multiple unit train operated by Keio Corporation, known for serving Tokyo’s Inokashira Line with modern, colorful commuter rolling stock.
-
D.
Tokyu 5000 series
The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
-
E.
446 series EMU
The 446 series EMU is a type of electric multiple unit train used for commuter and regional passenger services.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Odakyu 4000 series Target entity description: The Odakyu 4000 series is a Japanese electric multiple unit commuter train type operated by Odakyu Electric Railway, designed for through-services with Tokyo Metro and known for its modern, energy-efficient features.
-
A.
Seibu 40000 series
The Seibu 40000 series is a modern Japanese electric multiple unit train operated by Seibu Railway, designed for commuter services with features such as long-distance comfort seating and improved passenger amenities.
-
B.
Nagoya 5000 series trains
The Nagoya 5000 series trains are Japanese-built electric multiple units originally used in Nagoya that were later exported and adapted for service on Buenos Aires’ Line D of the underground.
-
C.
Keio 1000 series EMU
The Keio 1000 series EMU is a Japanese electric multiple unit train operated by Keio Corporation, known for serving Tokyo’s Inokashira Line with modern, colorful commuter rolling stock.
-
D.
Tokyu 5000 series
The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
-
E.
446 series EMU
The 446 series EMU is a type of electric multiple unit train used for commuter and regional passenger services.
- F. None of above. chosen
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese train type
ⓘ
commuter train ⓘ electric multiple unit ⓘ |
| brakeType | regenerative braking ⓘ |
| carBodyMaterial | stainless steel ⓘ |
| category | Odakyu Electric Railway rolling stock ⓘ |
| compatibleWith | Tokyo Metro Chiyoda Line ⓘ |
| country | Japan ⓘ |
| designedFor |
high passenger capacity
ⓘ
interoperability with other railway operators ⓘ quick boarding and alighting ⓘ through-services with Tokyo Metro ⓘ |
| doorConfiguration | 4 pairs of doors per side per car ⓘ |
| electrificationSystem | 1,500 V DC overhead catenary ⓘ |
| gaugeType | narrow gauge ⓘ |
| notableFeature |
energy-efficient design
ⓘ
through-running capability with subway lines ⓘ |
| operator | Odakyu Electric Railway ⓘ |
| operatorType | private railway company ⓘ |
| powerCollectionMethod | pantograph ⓘ |
| propulsion | electric ⓘ |
| region |
Greater Tokyo area
ⓘ
linked to:
Tokyo metropolitan area
|
| safetySystem | automatic train control compatible ⓘ |
| serviceRole |
all-stations stopping services
ⓘ
rapid and express commuter services ⓘ |
| serviceType | commuter service ⓘ |
| trackGauge | 1,067 mm ⓘ |
| tractionType | variable frequency drive ⓘ |
| trainType | suburban commuter EMU ⓘ |
| usedOn |
Odakyu Odawara Line
ⓘ
Odakyu Tama Line ⓘ Tokyo Metro Chiyoda Line through services ⓘ
linked to:
Tokyo Metro Chiyoda Line
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Odakyu 4000 series Description of subject: The Odakyu 4000 series is a Japanese electric multiple unit commuter train type operated by Odakyu Electric Railway, designed for through-services with Tokyo Metro and known for its modern, energy-efficient features.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Odakyu 4000 series
linked to: Odakyu 4000 series
linked to: Odakyu 4000 series